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Strange noise with cold starts S90-V90

uid 11021's pic
posted by  dewfpo on  Sat Apr 3 05:10 CST 2004
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last visit: Thu Oct 23 18:34 CST 2014
[RELATED]

Definitely sounds like the air injection pump. 99% of the time it only comes on after about 30 seconds or so after a cold start and only lasts for about 30 seconds. It pre-heats the catalytic convertor for reduced emissions on cold driveaways.

Surely you've noticed the pump coming on in the past, so it sounds like for some reason it is making more noise now than it has in the past. If the noise isn't too offensive, you can just live with it. The air pump on our 95 makes more noise than our 98, but it's not a problem.

If it really bothers you, you can get a used one from a recycler.

DEWFPO
--
1998 S90 068,300 and 1995 964 152,300






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